Apart from the first paragraph are these all just quotes from random parts of the internet?

The first two on period and comma here http://www.quotegarden.com/grammar.html

The next from el doctorow https://www.theguardian.com/books/2015/jul/22/el-doctorow-in-quotes-15-of-his-best

The exclamation point one is back to quote garden

The colon one from here

http://www.openculture.com/2014/07/theodor-adornos-philosophy-of-punctuation.html

You have to cite your sources or it looks like you are just plagiarising the internet and claiming it as your own